Publication

Abstract : This paper proposes a modified Asymmetrical Single-Phase Multilevel Inverter (ASP-MLI) with minimum number of power semiconductor devices. This inverter is extendable to any number of levels by cascading the basic units. The basic unit consists of two isolated DC sources and six power electronic devices, out of which two devices are bidirectional. This modified inverter is driven by three switching schemes. Among the three schemes, the last scheme is capable of generating more number of levels when compared to the remaining two schemes for the given number of power electronic devices and isolated DC sources. The modified ASP-MLI is compared with the conventional asymmetrical multilevel inverter in terms of number of power devices and Total Harmonic Distortion (THD). The proposed ASP-MLI is simulated using MATLAB/SIMULINK and the results are presented.